Bostrichobranchus is a genus of ascidian tunicates in the family Molgulidae.

Species within the genus Bostrichobranchus include:Sanamyan, K. (2015). Bostrichobranchus Traustedt, 1883 . In: Shenkar, N.; Gittenberger, A.; Lambert, G.; Rius, M.; Moreira Da Rocha, R.; Swalla, B.J.; Turon, X. (2015) Ascidiacea World Database. Accessed through: World Register of Marine Species on 2015-12-29. Bostrichobranchus digonas Abbott, 1951 Bostrichobranchus pilularis (Verrill, 1871) Bostrichobranchus septum Monniot, 1978

Species names currently considered to be synonyms: Bostrichobranchus manhattensis Traustedt, 1883: synonym of Bostrichobranchus pilularis (Verrill, 1871) Bostrichobranchus molguloides Metcalf, 1900: synonym of Bostrichobranchus pilularis (Verrill, 1871)

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